运动波源探究课件的设计与制作

现代教育十分注重为学生的学习创设良好的学习环境，使学生通过自主学习，去发现知识、理解知识并通过意义建构形成自己的认知结构，进而在获取知识的同时发展学生多方面的能力．随着现代教育技术的不断发展，充分利用计算机多媒体课件辅助中学物理课堂教学，是体现探究作为基础课程改革新理念的一个有效途径．     

物理课堂实施"探究-建构"教学模式探索

随着社会政治、经济的迅猛发展，我国的素质教育重心转移到培养学生的创新能力和实践能力．新一轮课程改革指出要建立新的教学方式，并将科学探究作为课程改革的突破口，以知识与技能、过程与方法、情感态度与价值观构建课程目标，培养全面发展的人．这对课堂教学提出了更高的要求，传统的课堂教学已不适应，必须加以改革．在中学物理教学中“探究一建构”型物理课堂教学是一种与新课程相协调的教学模式，它本着“突出学生主体地位，探究物理知识的形成过程，实现知识的意义建构，培养学生科学精神”的宗旨，对传统的课堂教学提出了挑战．     

农村中学实验教学与创新教育的思考

在信息技术和知识经济快速发展的今天，创新已成为民族振兴的关键，国家兴旺的基石．创新教育是现代教育的灵魂，要培养勇于创新的综合型人才，在现代教育中实施创新教育已成为人们的共识．而创新能力的培养，教育起着举足轻重的作用．在教学中应有意识地加强学生的创新意识和创新能力的培养，而中学物理实验教学则在这一培养链条中扮演着不可替代的角色．因此，实验教学在物理教学乃至整个创新教育中具有重要的地位．我们必须以这样的视角，认识目前中学物理实验教学的现状和解决问题的思路．     

"类似型"运动问题透视

当今世界科学技术的竞争，归根到底是具有创新思维能力的人才竞争．所以加强对学生的创新思维能力的培养，是时代赋予我们教育工作者义不容辞的职责．而“类比”思想是实现这一目标的有效途径，这就要求我们在教学工作中善于引导学生通过类比另辟蹊径去观察问题、思考问题，以使问题的解决方便可行；这种类比的思想在中学物理中比比皆是．本文拟总结力学和电磁学中的“类似型”运动，以供参考．     

中学物理积件实验教学体系的建构与实施

为适应中学物理课程改革对实验教学的要求，针对当前中学物理实验教学存在的实验器材凌乱化、实验场地传统化、实验课程开发碎片化和实验教学策略单一化的问题，采用积件化的思想，建构了中学物理积件实验室体系、积件实验教学课程体系和积件实验教学育人策略体系，并建立了以实验为中心的物理教学环境，完善和建构了中学物理积件实验教学体系.     

浅谈多媒体在物理教学中的应用

多媒体近年来已成为现代物理课堂教学中必不可少的手段．多媒体辅助物理教学，可以化抽象为直观、化微观为宏观、化静态为动态、化不可操作过程为可操作过程．对于突破教学重点、化解知识难点，培养学生的综合能力，推进素质教育具有重要意义．如何在新的课程标准的指导下，将多媒体技术应用于物理教学，提高物理课堂教学的效果，是广大物理教师在教学实践中值得探究的课题之一．     

把创新教育渗透到中学物理课堂教学中

研究了如何利用物理实验教学的优势 ,针对传统实验教学的不足 ,改进课堂教学方法 ,把创新教育渗透到中学物理课堂教学中去。     

培养学生质疑能力的方法

现代物理教学强调培养学生的创新精神和实践能力，提倡学生主动发现问题、提出问题，学会质疑问难，进而分析和解决问题．在初中物理教学中，努力培养学生的质疑能力和探究精神，是实施物理教育创新，提高学生创新素质的重要途径之一．利用课堂对学生进行质疑能力的培养，需要我们寻找一些具体途径和行之有效的方法．本文谈谈笔者实践的体会．     

高师"中学物理教材教法与实验"课程改革探讨

中学物理教学法是一门综合性的应用学科，是高等师范院校物理专业的一门必修课．它是以国家教育方针为依据，以物理学为基础，综合地运用教育学、心理学、哲学等学科的一般原理来研究中学物理教学的理论和实践的学科．师范专科学校开设此课程的目的，是研究整个初中物理教学基本规律和从教的技艺，为培养合格的初中物理教师服务．     

学术研讨式学习方式的构建与实施

本文是子课题“ 基于创新素养培育创新学习方式的探索”研究概要总结. 首先, 揭示现行中学物理创新 教育中存在问题, 提出基于拔尖创新人才培育的学术研讨式学习方式的重要性; 其次, 根据学术研讨的一般性结合 中学物理教学实际, 构建学术研讨式学习方式; 最后, 结合具体物理竞赛教学实例, 运用学术研讨式学习方式实施创 新学习的实践探索     

Superconductivity in the Bi - Sr - Cu - O system

During the investigation of the system Bi–Sr–Cu–O a novel family of superconducting oxides, close to the composition Sr₂Bi₂Cu₂O₇₊ has been isolated, with a midpoint critical temperature ranging from 7 K to 22 K. The X-ray diffraction and high-resolution electron microscopy studies have shown its relationships with perovskite and demonstrated its bidimensional character. The possible relationships of this lamellar oxide with Aurivillius phases is discussed.     

Identification ofμ +-sites in the 1-2-3 compoundin the 1-2-3 compound

Possibleμ ⁺ sites have been identified by a comparison of measured spontaneous internal fields in YBa₂Cu₃O_6+δ and REBa₂Cu₃O_7−δ and of measured second moments and width of transverse field powder spectra with the corresponding calculated quantities. In the YBa₂Cu₃O₇ system only one possibleμ ⁺ site emerges at a distance of ∼1.05 A from a chain oxygen O(4) at the position (0.15(1), 0.44(1), 0.071(1)). In the system YBa₂Cu₃O₆ the only possibleμ ⁺ sites are near to an oxygen O(1) with z/c=0.133 and the same distance as above. The analysis leads also to improved valuesμ _Ho = 2.2(1)μ _B andμ _Cu = 0.67(4)μ _B and to a determination of the latters direction:μ _Cu ‖〈110〉.     

Analysis of the 33-133-133-1final state in photon-photon collisions

The reactione ⁺ e ^- e ⁺ e ^{- 00}e ⁺ e ^- 6 has been analysed using the full data sample taken with the Crystal Ball detector at the DORIS II storage ring at DESY. The ⁰⁰ invariant mass spectrum is dominated by the ', for which we determine the radiative width (') to be (4.5±0.3±0.5)keV. Near 1.9 GeV/c² we observe a second enhancement in the ⁰⁰ mass distribution. Assuming that these events are created by the production and subsequent decay of a wide resonanceX(1900), we have investigated the decay modes, the invariant mass distributions of the ⁰ and ⁰⁰ subsystems and the angular distributions of the final state mesons. We find that the data is best described byJ ^PC=2. For thisJ ^P assignment the resonance parameters are (X) BR(X)=(0.95±0.27±0.20) keV _tot (X)=(221±92±44)MeV, andM(X)=(1881±32±40) MeV/c².Deceased     

Remarks concerning the d-d spectral transitions in 595-01595-01595-01

The paper interprets d-d spectral transitions of the ceramic superconductor YBa₂Cu₃O_7– within the scope of the crystal field theory. This theory allows the determination of the d-d spectral transitions as functions of chosen charges by using the appropriate choice of charges on ligands and central ions.     

Effective interactions in the Λ-α and Λ-Λ-α systems

The neutron-rich nuclei³³Si,³⁴Si,³⁵Si,³⁵P,³⁶P,³⁷S and³⁸S were investigated by studying¹⁴C and¹⁸O — induced transfer reactions on³⁶S using aQ3D magnetic spectrograph and a position sensitive focal plane gas detector. The previously unknown mass of the isotope³⁵Si was determined. The accuracy of the mass excess values of the isotopes³³Si,³⁴Si,³⁵P and³⁶P has been improved. Excited states of the isotopes³³Si,³⁴Si,³⁵P,³⁶P and³⁸S were identified for the first time. In addition theγ-decay of excited states in³⁷S and³⁸S was studied with a Ge(Li) detector in coincidence with theQ3D focal plane detector. Experimental values for the mass excesses are compared with published mass formulae.     

Concerning the Landau pole in 3-3-1 models

Some 3-3-1 models predict the existence of a non-perturbative regime at the TeV scale. We study in these models and their supersymmetric extensions, the energy at which the non-perturbative limit and a Landau-like pole arise. An order of magnitude for the mass of the extra neutral vector boson, , present in these models is also obtained.Received: 12 October 2004, Revised: 1 November 2004, Published online: 21 December 2004PACS: 12.60.Cn, 12.60.Jv     

Telepistemology - knowledge in the age of the Internet

The crucial role of atomic and molecular collision processes in a number of outstanding issues in current magnetic fusion research is discussed. These issues are related to the achievement and control of thermonuclear burn conditions, thermal power and particle exhaust, and the optimization of fusion reactor performance. The status of the present knowledge on the characteristics of collision processes (cross sections, reaction rate coefficients) involved in these fusion research issues is presented. Significant gaps in this knowledge that prevent a full understanding of the background physics of the above mentioned fusion research problems and may affect the ways of their solution are identified. One of the purposes of the present article is to provide a motivation for undertaking the necessary atomic and molecular physics studies for bridging these gaps.     

The absorption spectrum of CuH in the 2350- to 1890-Å region

The high-dispersion absorption spectrum of the CuH molecule has been photographed in the ～2500- to 1750-Å region. Observations include the previously reported $\text{D}{}^1\text{Π}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$ and $\text{E}{}^1\text{Σ}{}^{\mathrm{+}}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$ transitions and four new transitions which occur between 2100 and 1890 Å: $\text{F 1}{}^{\mathrm{\pm }}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$, $\text{G 0}{}^{\mathrm{+}}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$, $\text{H 1}{}^{\mathrm{\pm }}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$, and $\text{I 1}{}^{\mathrm{\pm }}\text{-X}{}^1\text{Σ}{}^{\mathrm{+}}$. The $\text{D}{}^1\text{Π}$ state has been characterized through v = 2 while the new observations on $\text{E}{}^1\text{Σ}{}^{\mathrm{+}}$ include v = 11 through 16. The F, H, and I states are characterized through v = 1. All of the upper states exhibit perturbations. In addition the H 1^± and I 1^± states show signs of predissociation.     

Inflationary scenario in the supersymmetric economical 3-3-1 model

We construct the supersymmetric economical 3-3-1 model which contains inflationary scenario and avoids the monopole puzzle. Based on the spontaneous symmetry breaking pattern (with three steps), the F-term inflation is derived. The slow-roll parameters ∈ and η are calculated. By imposing as experimental five-year WMAP data on the spectral index n, we have derived a constraint on the number of e-folding N _Q to be in the range from 25 to 50. The scenario for large-scale structure formation implied by the model is a mixed scenario for inflation and cosmic string, and the contribution to the CMBR temperature anisotropy depends on the ratio M _X /M _Pl. From the COBE data, we have obtained the constraint on the M _X to be M _X ∈ [1.22 × 10¹⁶, 0.98 × 10¹⁷] GeV. The upper value M _X ≃ 10¹⁷ GeV is a result of the analysis in which the inflationary contribution to the temperature fluctuations measured by the COBE is 90%. The coupling α varies in the range: 10⁻⁷−10⁻¹. This value is not so small, and it is a common characteristics of the supersymmetric unified models with the inflationary scenario. The spectral index n is a little bit smaller than 0.98. The SUGRA corrections are slightly different from the previous consideration. When ξ ≪ 1 and α lies in the above range, the spectral index gets the value consistent with the experimental five-year WMAP data. Comparing with string theory, one gets ξ < 10⁻⁸. Numerical analysis shows that α ≈ 10⁻⁶. To get inflation contribution to the CMBR temperature anisotropy ≈90%, the mass scale M _X < 3.5 × 10¹⁴ GeV.     

Charged Higgs boson in the economical 3-3-1 model

The SU(3) _C ⊗ SU(3) _L ⊗ U(1) _X gauge model with two Higgs triplets (the economical 3-3-1 model) is presented. The minimal Higgs potential is considered in detail, and new Higgs bosons with the mass proportional to the bilepton mass are predicted. In the effective approximation, the charged Higgs bosons H ₂ ^± are scalar bileptons, while the neutral scalar bosons H ⁰ and H ₁ ⁰ do not carry a lepton number. The couplings of the charged Higgs bosons to leptons and quarks are given. We show that Yukawa couplings of H ₂ ^± to ordinary leptons and quarks are lepton-number violating. The pair production of H ₂ ^± at high-energy e ⁺ e ⁻ colliders with the polarization of the e ⁺, e ⁻ beams is studied in detail. A numerical evaluation shows that, if the Higgs mass is not too heavy, then the reaction can give an observable cross section in future colliders at a high degree of polarization. The reaction e ⁺ e ⁻ → H ₂ ^± W ^∓ is also examined. We show that the production cross sections of H ₂ ^± W ^∓ are very small, much below the pair production of H ₂ ^± , and, therefore, the associated production of H ₂ ^± and W ^∓ is, in general, not expected to lead to easily observable signals in the e ⁺ e ⁻ annihilation. The text was submitted by the authors in English.